US5123429A - Smoking articles - Google Patents

Smoking articles Download PDF

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Publication number
US5123429A
US5123429A US07/401,718 US40171889A US5123429A US 5123429 A US5123429 A US 5123429A US 40171889 A US40171889 A US 40171889A US 5123429 A US5123429 A US 5123429A
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Prior art keywords
cigarettes
inventive
smoking
weight
smoking article
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US07/401,718
Inventor
Paul D. Case
Charles N. Lehuquet
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British American Tobacco Investments Ltd
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British American Tobacco Co Ltd
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Assigned to BRITISH-AMERICAN TOBACCO COMPANY LIMITED, reassignment BRITISH-AMERICAN TOBACCO COMPANY LIMITED, ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: CASE, PAUL D., LEHUQUET, CHARLES N.
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Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D1/00—Cigars; Cigarettes
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D1/00—Cigars; Cigarettes
    • A24D1/02—Cigars; Cigarettes with special covers
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/03—Non-macromolecular organic compounds
    • D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
    • D21H17/14—Carboxylic acids; Derivatives thereof
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/63—Inorganic compounds
    • D21H17/67—Water-insoluble compounds, e.g. fillers, pigments

Definitions

  • the invention the subject of this application relates to cigarettes and similar smoking articles.
  • the subject invention provides a smoking article comprising a smoking material rod, which rod comprises smoking material and a paper wrapper circumscribing said smoking material, said wrapper comprising 1 to 50 per cent by weight of combustion modifying compound, said compound being calcium sulphate and/or calcium tartrate.
  • the calcium sulphate and/or calcium tartrate is incorporated in the wrapper paper as a filler substance at the paper making stage.
  • the calcium sulphate and/or calcium tartrate of wrapper papers of smoking articles according to the subject invention may constitute a proportion of the total filler content, the remaining proportion being, for example, one or more of calcium carbonate, magnesium oxide, magnesium hydroxide, alumina and Attapulgite clay.
  • the proportion of the total filler content accounted for by the calcium sulphate and/or calcium tartrate may approach or be 100 per cent.
  • Wrapper papers of smoking articles according to the subject invention may have had applied to them, suitably in aqueous solution, one or more burn retardant substances.
  • the calcium sulphate and/or calcium tartrate of wrappers of smoking articles according to the subject invention is advantageously present at a level of at least about 5 per cent, and more advantageously at least about 7 per cent, by weight. It is also advantageous that the calcium sulphate and/or calcium tartrate level does not exceed about 40 per cent by weight and more advantageous that it does not exceed about 35 per cent by weight.
  • Calcium sulphate utilised for the purposes of the subject invention may be of a hydrated form, preferably being a dihydrate.
  • Wrappers of smoking articles according to the subject invention may be of an air permeability in a range of 3 to 200 Coresta units.
  • standard machine smoking conditions refers to Coresta standard machine smoking conditions, according to which a 35 cm 3 puff of two seconds duration is taken every minute.
  • production rate of sidestream smoke components has reference to the total yield of a sidestream smoke component in smoking a smoking article divided by a value obtained by substracting one from the puff number (PN) of the smoking article, the value (PN-1) being the number of inter-puff smoulder periods.
  • Smoking articles in accordance with the subject invention should preferably exhibit, when smoked under standard machine smoking conditions, a production rate of sidestream smoke particulate matter, on a water and nicotine free basis, (PMWNF) not exceeding 2.5 mg min -1 , a production rate of sidestream total nicotine alkaloids (TNA) not exceeding 0.4 mg min -1 and a production rate of sidestream carbon monoxide not exceeding 5 mg min -1 .
  • PMWNF production rate of sidestream smoke particulate matter, on a water and nicotine free basis,
  • TAA sidestream total nicotine alkaloids
  • a production rate of sidestream carbon monoxide not exceeding 5 mg min -1 .
  • a determinant of the production rate of sidestream TNA is the original nicotine content of the smoking material.
  • smoking articles in accordance with the subject invention When smoked under standard machine smoking conditions, smoking articles in accordance with the subject invention advantageously provide not less than six puffs and more preferably not less than seven puffs.
  • smoking articles which exhibit a greater puff number than do control smoking articles, which control smoking articles comprise conventional and comparable paper wrappers, without there resulting a significant increase in the ratio of mainstream smoke carbon monoxide to PMWNF.
  • This phenomenon is very useful to the cigarette designer since it was observed heretofore that if no compensatory measures were taken, the introduction of a proportion of expanded tobacco into a tobacco blend resulted in a reduced cigarette puff number, whereas if the puff number was restored by using cigarette paper of low air permeability or cigarette paper comprising a burn retardant, the carbon monoxide to particulate matter ratio was significantly increased.
  • the smoking material suitably comprises cut leaf tobacco, a portion of which, preferably not less than 20 per cent by weight, may be expanded tobacco.
  • the smoking material may comprise a reconstituted tobacco or a tobacco substitute.
  • a smoking material rod of a smoking article in accordance with the subject invention is of uniform circular cross-section
  • the circumference of the rod may be, for example, in a range of 12.5 mm to 30 mm.
  • Smoking articles in accordance with the subject invention may comprise filter or mouthpiece means attached to the smoking material rod at one end thereof.
  • Smoking articles in accordance with the subject invention may incorporate ventilation means.
  • Control cigarettes were produced comprising cigarette rods, of a length of 64 mm and a circumference of 24.75 mm, and 20 mm long cellulose acetate filters.
  • the cigarette rods comprised a cut tobacco Virginia blend filler of 80% lamina and 20% stem.
  • the density of the rod filler was 280 mg cm -3 .
  • the cigarette paper wrapper of the cigarette rods was of an air permeability of 28 Coresta units and a substance of 39 g m -2 .
  • the cigarette paper contained as filler calcium carbonate at a loading level of 29% by weight. The cigarette paper did not comprise a burn additive.
  • the puff number of these control cigarettes was determined to be 9.1.
  • the static burn rate of the control cigarettes was determined to be 4 mm min -1 .
  • Cigarettes according to the subject invention were produced.
  • the inventive cigarettes were the same as the control cigarettes in all particulars excepting that the cigarette paper wrappers of the inventive cigarettes were of an air permeability of 19 Coresta units, a basis weight of 39 g m -2 and contained as filler 28% by weight of calcium sulphate (grade SABXO supplied by Lambert), no other filler substance being present and no burn additives being present.
  • inventive cigarettes When smoked under standard machine smoking conditions the inventive cigarettes were found to have a puff number of 12.5.
  • the static burn rate of the inventive cigarettes was determined to be 2.45 mm min -1 .
  • the permeabilities of the paper wrappers of control and inventive cigarettes were 28 and 20 Coresta units (C.U.) respectively.
  • the permeabilities of the paper wrappers of control and inventive cigarettes were 11 and 13 C.U. respectively.
  • the control and inventive cigarettes of Examples II-IV comprised cigarette rods, of a length of 64 mm and a circumference of 24.75 mm, and 20 mm long cellulose acetate filters, which filters were identical for all of the cigarettes.
  • the cigarette rods of the control and inventive cigarettes of Examples II and III comprised a cut tobacco filler comprised of 80% lamina and 20% stem by weight.
  • the cigarette rods of the control and inventive cigarettes of Example IV comprised a cut tobacco filler comprised of 16% DIET-expanded lamina, 64% non-expanded lamina and 20% stem by weight.
  • Cigarettes of four types were made, all of the cigarettes being of the dimensional format mentioned above in regard to the cigarettes of Examples II-IV.
  • the four types of cigarettes comprised paper wrappers and tobacco fillers as noted below:
  • Cut tobacco filler comprising 80% by weight of DIET-expanded tobacco.
  • Cut tobacco filler comprising 80% by weight of DIET-expanded tobacco.
  • Smoking of cigarettes 1-4 under standard machine smoking conditions yielded results as follows in respect of total deliveries of sidestream smoke components and of puff number.
  • control cigarettes were the same control cigarettes as used in Example III.
  • inventive cigarettes Upon smoking the inventive cigarettes under standard machine smoking conditions it was found that the inventive cigarettes exhibited a puff number of 11.8 and a mainstream CO to mainstream PMWNF ratio of 1.08.
  • control cigarettes were the same control cigarettes as used in Example III.
  • the calcium tartrate was supplied by Lohmann.
  • inventive cigarettes Upon smoking the inventive cigarettes under standard machine conditions it was found that the inventive cigarettes exhibited a puff number of 10.3 and a mainstream CO to mainstream PMWNF ratio of 0.95.

Abstract

A cigarette having a wrapper comprising one to fifty percent by weight of calcium sulphate and/or calcium tartrate exhibits reduced sidestream smoke delivery and increased puff number.

Description

The invention the subject of this application relates to cigarettes and similar smoking articles.
It is an object of the subject invention to provide improved low sidestream cigarettes or similar low sidestream smoking articles.
It is a further object of the subject invention to provide in advantageous manner smoking articles of enhanced puff number.
The subject invention provides a smoking article comprising a smoking material rod, which rod comprises smoking material and a paper wrapper circumscribing said smoking material, said wrapper comprising 1 to 50 per cent by weight of combustion modifying compound, said compound being calcium sulphate and/or calcium tartrate.
Preferably, the calcium sulphate and/or calcium tartrate is incorporated in the wrapper paper as a filler substance at the paper making stage. In that it is normal for paper employed as cigarette rod wrapper paper to comprise a filler substance, most commonly calcium carbonate, the calcium sulphate and/or calcium tartrate of wrapper papers of smoking articles according to the subject invention may constitute a proportion of the total filler content, the remaining proportion being, for example, one or more of calcium carbonate, magnesium oxide, magnesium hydroxide, alumina and Attapulgite clay. The proportion of the total filler content accounted for by the calcium sulphate and/or calcium tartrate may approach or be 100 per cent.
Wrapper papers of smoking articles according to the subject invention may have had applied to them, suitably in aqueous solution, one or more burn retardant substances.
The calcium sulphate and/or calcium tartrate of wrappers of smoking articles according to the subject invention is advantageously present at a level of at least about 5 per cent, and more advantageously at least about 7 per cent, by weight. It is also advantageous that the calcium sulphate and/or calcium tartrate level does not exceed about 40 per cent by weight and more advantageous that it does not exceed about 35 per cent by weight.
Calcium sulphate utilised for the purposes of the subject invention may be of a hydrated form, preferably being a dihydrate.
Wrappers of smoking articles according to the subject invention may be of an air permeability in a range of 3 to 200 Coresta units.
By employing the subject invention there may be provided smoking articles which exhibit when smoked under standard machine smoking conditions a reduced production rate of sidestream smoke components. As used herein "standard machine smoking conditions" refers to Coresta standard machine smoking conditions, according to which a 35 cm3 puff of two seconds duration is taken every minute.
The term "production rate of sidestream smoke components" as used herein has reference to the total yield of a sidestream smoke component in smoking a smoking article divided by a value obtained by substracting one from the puff number (PN) of the smoking article, the value (PN-1) being the number of inter-puff smoulder periods.
Smoking articles in accordance with the subject invention should preferably exhibit, when smoked under standard machine smoking conditions, a production rate of sidestream smoke particulate matter, on a water and nicotine free basis, (PMWNF) not exceeding 2.5 mg min-1, a production rate of sidestream total nicotine alkaloids (TNA) not exceeding 0.4 mg min-1 and a production rate of sidestream carbon monoxide not exceeding 5 mg min-1. As will be readily apparent to those skilled in the art, a determinant of the production rate of sidestream TNA is the original nicotine content of the smoking material.
When smoked under standard machine smoking conditions, smoking articles in accordance with the subject invention advantageously provide not less than six puffs and more preferably not less than seven puffs.
By employing the subject invention there may be provided smoking articles which exhibit a greater puff number than do control smoking articles, which control smoking articles comprise conventional and comparable paper wrappers, without there resulting a significant increase in the ratio of mainstream smoke carbon monoxide to PMWNF. This phenomenon is very useful to the cigarette designer since it was observed heretofore that if no compensatory measures were taken, the introduction of a proportion of expanded tobacco into a tobacco blend resulted in a reduced cigarette puff number, whereas if the puff number was restored by using cigarette paper of low air permeability or cigarette paper comprising a burn retardant, the carbon monoxide to particulate matter ratio was significantly increased.
In smoking articles according to the subject invention the smoking material suitably comprises cut leaf tobacco, a portion of which, preferably not less than 20 per cent by weight, may be expanded tobacco. The smoking material may comprise a reconstituted tobacco or a tobacco substitute.
If, as is commonly the case with cigarettes and like smoking articles, a smoking material rod of a smoking article in accordance with the subject invention is of uniform circular cross-section, the circumference of the rod may be, for example, in a range of 12.5 mm to 30 mm.
Smoking articles in accordance with the subject invention may comprise filter or mouthpiece means attached to the smoking material rod at one end thereof.
Smoking articles in accordance with the subject invention may incorporate ventilation means.
In order to further the understanding of the subject invention, examples according thereto will now be described.
EXAMPLE I
Control cigarettes were produced comprising cigarette rods, of a length of 64 mm and a circumference of 24.75 mm, and 20 mm long cellulose acetate filters. The cigarette rods comprised a cut tobacco Virginia blend filler of 80% lamina and 20% stem. The density of the rod filler was 280 mg cm-3. The cigarette paper wrapper of the cigarette rods was of an air permeability of 28 Coresta units and a substance of 39 g m-2. The cigarette paper contained as filler calcium carbonate at a loading level of 29% by weight. The cigarette paper did not comprise a burn additive.
When smoked under standard machine smoking conditions the puff number of these control cigarettes was determined to be 9.1. The static burn rate of the control cigarettes was determined to be 4 mm min-1.
Cigarettes according to the subject invention ("inventive cigarettes") were produced. The inventive cigarettes were the same as the control cigarettes in all particulars excepting that the cigarette paper wrappers of the inventive cigarettes were of an air permeability of 19 Coresta units, a basis weight of 39 g m-2 and contained as filler 28% by weight of calcium sulphate (grade SABXO supplied by Lambert), no other filler substance being present and no burn additives being present.
When smoked under standard machine smoking conditions the inventive cigarettes were found to have a puff number of 12.5. The static burn rate of the inventive cigarettes was determined to be 2.45 mm min-1.
Total sidestream yields and production rates of PMWNF, TNA and CO for the control and the inventive cigarettes when smoked under standard machine smoking conditions are given in the table below. As may be seen from the table, for each of the sidestream smoke components featured, the inventive cigarettes exhibited a lower total yield and a lower production rate than did the control cigarettes. The production rates of sidestream PMWNF, TNA and CO for the inventive cigarettes are, in fact, reduced by 40%, 44% and 40% respectively. This means that if the length of the cigarette rods of the inventive cigarettes was reduced to a length such that the puff number of the inventive cigarettes was reduced to 9.1, i.e. to that of the control cigarettes, the total sidestream yields of PMWNF, TNA and CO of the inventive cigarettes would be reduced by 40%, 44% and 40% respectively, or perhaps even more, compared with the control cigarettes.
______________________________________                                    
                  PMWNF  TNA    CO                                        
______________________________________                                    
Control   Sidestream    29.1     5.13 63.9                                
          Delivery (mg)                                                   
          Production    3.59     0.63 7.87                                
          Rate (mg min.sup.-1)                                            
Inventive Sidestream    26.9     4.41 59.1                                
          Delivery (mg)                                                   
          Production    2.15     0.35 4.72                                
          Rate (mg min.sup.-1)                                            
______________________________________
EXAMPLE II
The paper wrappers of control and inventive cigarettes had characteristics as follows:
______________________________________                                    
Basis                Filler                                               
Weight               Level                                                
gsm          Filler  %        Supplier                                    
                                     Grade                                
______________________________________                                    
Control 39       CaCO.sub.3                                               
                         29     Solvay 90A                                
Inventive                                                                 
        39       CaSO.sub.4                                               
                         28     Lambert                                   
                                       SABXO                              
______________________________________
The permeabilities of the paper wrappers of control and inventive cigarettes were 28 and 20 Coresta units (C.U.) respectively.
Smoking of the cigarettes under standard machine smoking conditions yielded the following results:
______________________________________                                    
          Puff Number                                                     
                   CO:PMWNF Ratio                                         
______________________________________                                    
Control     9.1        1.18                                               
Inventive   12.3       1.21                                               
______________________________________
EXAMPLE III
The paper wrappers of control and inventive cigarettes had characteristics as set forth in the table on the following page.
__________________________________________________________________________
Basis          Filler                                                     
Weight         Level          Permeability                                
gsm       Filler                                                          
               %   Supplier                                               
                        Grade C.U.                                        
__________________________________________________________________________
Control                                                                   
      33  CaCO.sub.3                                                      
               34  Solvay                                                 
                        90A   46                                          
Inventive 1                                                               
      33  CaSO.sub.4                                                      
               34  Lambert                                                
                        DH 15 38                                          
Inventive 2                                                               
      33  CaSO.sub.4                                                      
               32  Arnaud                                                 
                        95GE  35                                          
Inventive 3                                                               
      33  CaSO.sub.4                                                      
               30  Joud Albiclay                                          
                              43                                          
Inventive 4                                                               
      33  CaSO.sub.4                                                      
               34  Lambert                                                
                        GM 15 40                                          
Inventive 5                                                               
      33  CaSO.sub.3                                                      
               16.5                                                       
                   Solvay                                                 
                        90A   44                                          
          CaSO.sub.4                                                      
               12.4                                                       
                   Lambert                                                
                        DH 15                                             
Inventive 6                                                               
      33  CaSO.sub.3                                                      
               18.0                                                       
                   Solvay                                                 
                        90A   34                                          
          CaSO.sub.4                                                      
               15.0                                                       
                   Arnaud                                                 
                        95 GE                                             
Inventive 7                                                               
      33  CaSO.sub.3                                                      
               17.0                                                       
                   Solvay                                                 
                        90A   44                                          
          CaSO.sub.4                                                      
               13.9                                                       
                   Joud Albiclay                                          
__________________________________________________________________________
For inventive cigarettes 1, 2, 4, 5 and 6 the calcium sulphate was in dihydrate form.
Smoking of the cigarettes under standard machine smoking conditions yielded the following results:
______________________________________                                    
          Puff Number                                                     
                   CO:PMWNF Ratio                                         
______________________________________                                    
Control     9.0        1.05                                               
Inventive 1 10.5       1.06                                               
Inventive 2 10.5       1.05                                               
Inventive 3 9.5        1.07                                               
Inventive 4 9.8        1.03                                               
Inventive 5 9.9        0.98                                               
Inventive 6 10.2       0.99                                               
Inventive 7 10.0       1.06                                               
______________________________________
EXAMPLE IV
The paper wrappers of control and inventive cigarettes had characteristics as follows:
______________________________________                                    
Basis                Filler                                               
Weight               Level                                                
gsm          Filler  %        Supplier                                    
                                     Grade                                
______________________________________                                    
Control 41.0     CaCO.sub.3                                               
                         31.5   --     --                                 
Inventive                                                                 
        40.2     CaCO.sub.3                                               
                         10.0   --     --                                 
                 CaSO.sub.4                                               
                         20.8   Joud   Albiclay                           
______________________________________
The permeabilities of the paper wrappers of control and inventive cigarettes were 11 and 13 C.U. respectively.
Smoking of the cigarettes under standard machine smoking conditions yielded the following results:
______________________________________                                    
          Puff Number                                                     
                   CO:PMWNF Ratio                                         
______________________________________                                    
Control     8.9        1.29                                               
Inventive   9.3        1.27                                               
______________________________________
The control and inventive cigarettes of Examples II-IV comprised cigarette rods, of a length of 64 mm and a circumference of 24.75 mm, and 20 mm long cellulose acetate filters, which filters were identical for all of the cigarettes.
The cigarette rods of the control and inventive cigarettes of Examples II and III comprised a cut tobacco filler comprised of 80% lamina and 20% stem by weight.
The cigarette rods of the control and inventive cigarettes of Example IV comprised a cut tobacco filler comprised of 16% DIET-expanded lamina, 64% non-expanded lamina and 20% stem by weight.
From the results set forth in Examples II-IV it is to be observed that by use of cigarettes in accordance with the present invention it is possible to provide for an enhanced puff number without there resulting unacceptable increases in the mainstream CO to mainstream PMWNF ratio.
EXAMPLE V
Cigarettes of four types were made, all of the cigarettes being of the dimensional format mentioned above in regard to the cigarettes of Examples II-IV. The four types of cigarettes comprised paper wrappers and tobacco fillers as noted below:
Cigarette 1
Paper wrapper as per the control cigarette of Example II.
Filler wholly of non-expanded cut tobacco.
Cigarette 2
Paper wrapper as per the control cigarettes of Example II.
Cut tobacco filler comprising 80% by weight of DIET-expanded tobacco.
Cigarette 3
Paper as per the inventive cigarettes of Example II.
Filler wholly of non-expanded cut tobacco.
Cigarette 4
Paper as per the inventive cigarettes of Example II.
Cut tobacco filler comprising 80% by weight of DIET-expanded tobacco.
Smoking of cigarettes 1-4 under standard machine smoking conditions yielded results as follows in respect of total deliveries of sidestream smoke components and of puff number.
______________________________________                                    
                                 Puff                                     
         PMWNF  TNA       CO     Number                                   
______________________________________                                    
Cigarette 1                                                               
           29.1     5.13      63.9 9.9                                    
Cigarette 2                                                               
           24.1     3.25      37.1 7.9                                    
Cigarette 3                                                               
           26.9     4.41      59.1 12.9                                   
Cigarette 4                                                               
           22.8     2.80      34.3                                        
(predicted)                                                               
Cigarette 4                                                               
           17.7     2.48      28.3 9.9                                    
(actual)                                                                  
______________________________________
From these results it is to be observed that by use of cigarettes which are in accordance with the subject invention and which contain expanded tobacco it is possible to provide for sidestream smoke components yields which are reduced to values which are lower than would be expected on a directly proportional basis, whilst maintaining puff number.
EXAMPLE VI
In this example the control cigarettes were the same control cigarettes as used in Example III.
Inventive cigarettes were of the dimensional format mentioned above in regard to the cigarettes of Examples II-IV.
The paper wrappers of the inventive cigarettes had characteristics as follows:
______________________________________                                    
Basis Weight (gsm)  33                                                    
Filler              Calcium tartrate                                      
Filler level (%)    26.3                                                  
Supplier of filler  Lohmann                                               
Permeability (C.U.) 50                                                    
______________________________________
Upon smoking the inventive cigarettes under standard machine smoking conditions it was found that the inventive cigarettes exhibited a puff number of 11.8 and a mainstream CO to mainstream PMWNF ratio of 1.08.
EXAMPLE VII
In this example too the control cigarettes were the same control cigarettes as used in Example III.
Inventive cigarettes were of the dimensional format mentioned above in regard to the cigarettes of Examples II-IV.
The paper wrappers of the inventive cigarettes had characteristics as follows:
______________________________________                                    
Basis Weight (gsm)                                                        
                  33                                                      
Filler            Calcium tartrate                                        
                  plus Calcium carbonate                                  
Filler level (%)  12.2 (tartrate)                                         
                  14.6 (carbonate)                                        
Permeability (C.U.)                                                       
                  40                                                      
______________________________________
The calcium tartrate was supplied by Lohmann.
Upon smoking the inventive cigarettes under standard machine conditions it was found that the inventive cigarettes exhibited a puff number of 10.3 and a mainstream CO to mainstream PMWNF ratio of 0.95.

Claims (8)

What is claimed is:
1. A smoking article comprising a smoking material rod, which rod comprises tobacco and a paper wrapper circumscribing said rod, said wrapping comprising 1 to 50 per cent by weight of combustion modifying compound, said compound being calcium sulphate and calcium tartrate said amount increasing the puff number in said smoking article.
2. A smoking article according to claim 1, wherein the total filler content of said wrapper does not exceed 50 per cent by weight.
3. A smoking article according to claim 1 wherein said wrapper comprises not less than 5 per cent by weight of said compound.
4. A smoking article according to claim 3, wherein said wrapper comprises not less than 7 per cent by weight of said compound.
5. A smoking article according to any one of claim 1 wherein said wrapper comprises not more than about 40 per cent by weight of said compound.
6. A smoking article according to claim 5, wherein said wrapper comprises not more than about 35 per cent by weight of said compound.
7. A smoking article according to claim 1 wherein said wrapper comprises calcium carbonate.
8. A smoking article according to claim 1, wherein said smoking material comprises expanded tobacco.
US07/401,718 1988-08-30 1989-09-01 Smoking articles Expired - Fee Related US5123429A (en)

Applications Claiming Priority (2)

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GB888820496A GB8820496D0 (en) 1988-08-30 1988-08-30 Improvements relating to smoking articles
GB8820496 1988-08-30

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JP (1) JPH02156877A (en)
KR (1) KR900002728A (en)
AR (1) AR248341A1 (en)
AU (1) AU633265B2 (en)
BR (1) BR8904433A (en)
CA (1) CA1317524C (en)
DK (1) DK424589A (en)
FI (1) FI894019A (en)
GB (1) GB8820496D0 (en)
MX (1) MX172963B (en)
MY (1) MY104996A (en)
NO (1) NO893351L (en)
NZ (1) NZ230405A (en)
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US6030393A (en) * 1998-09-15 2000-02-29 Corlew; Earvin L. Needle and procedure for relieving urinary incontinence
US6138684A (en) * 1995-09-07 2000-10-31 Japan Tobacco Inc. Smoking paper for smoking article
CN116411485A (en) * 2023-04-06 2023-07-11 云南中烟工业有限责任公司 Cigarette paper, preparation method and application thereof

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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US5103844A (en) * 1990-06-07 1992-04-14 R. J. Reynolds Tobacco Company Cigarette paper and cigarette incorporating same
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KR900002728A (en) 1990-03-23
FI894019A (en) 1990-03-01
ZA896325B (en) 1990-07-25
EP0357359A3 (en) 1990-12-19
FI894019A0 (en) 1989-08-28
JPH02156877A (en) 1990-06-15
DK424589D0 (en) 1989-08-29
AU633265B2 (en) 1993-01-28
BR8904433A (en) 1990-05-08
CA1317524C (en) 1993-05-11
NZ230405A (en) 1992-12-23
AR248341A1 (en) 1995-08-18
DK424589A (en) 1990-03-01
MY104996A (en) 1994-07-30
AU4025389A (en) 1990-03-08
MX172963B (en) 1994-01-26
EP0357359A2 (en) 1990-03-07
NO893351L (en) 1990-03-01
NO893351D0 (en) 1989-08-21
GB8820496D0 (en) 1988-09-28

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